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fix(eslint-plugin): [no-unsafe-enum-comparison] support unions of literals#11599
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fix(eslint-plugin): [no-unsafe-enum-comparison] support unions of literals#11599
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Thanks for the PR,@kirkwaiblinger! typescript-eslint is a 100% community driven project, and we are incredibly grateful that you are contributing to that community. The core maintainers work on this in their personal time, so please understand that it may not be possible for them to review your work immediately. Thanks again! 🙏Please, if you or your company is finding typescript-eslint valuable, help us sustain the project by sponsoring it transparently onhttps://opencollective.com/typescript-eslint. |
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Codecov Report✅ All modified and coverable lines are covered by tests. Pleaseupload reports for the commite74b701 to get more accurate results. Additional details and impacted files@@ Coverage Diff @@## main #11599 +/- ##======================================= Coverage 90.90% 90.90% ======================================= Files 505 505 Lines 51208 51218 +10 Branches 8441 8444 +3 =======================================+ Hits 46551 46561 +10 Misses 4644 4644 Partials 13 13
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👌 nice.
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| datasource | package | from | to || ---------- | -------------------------------- | ------ | ------ || npm | @typescript-eslint/eslint-plugin | 8.44.0 | 8.44.1 || npm | @typescript-eslint/parser | 8.44.0 | 8.44.1 |## [v8.44.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8441-2025-09-22)##### 🩹 Fixes- **eslint-plugin:** \[await-thenable] should not report passing values to promise aggregators which may be a promise in an array literal ([#11611](typescript-eslint/typescript-eslint#11611))- **eslint-plugin:** \[no-unsafe-enum-comparison] support unions of literals ([#11599](typescript-eslint/typescript-eslint#11599))- **eslint-plugin:** \[no-base-to-string] make ignoredTypeNames match type names without generics ([#11597](typescript-eslint/typescript-eslint#11597))##### ❤️ Thank You- Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger)- mdm317- Ronen AmielYou can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.
| datasource | package | from | to || ---------- | -------------------------------- | ------ | ------ || npm | @typescript-eslint/eslint-plugin | 8.44.0 | 8.44.1 || npm | @typescript-eslint/parser | 8.44.0 | 8.44.1 |## [v8.44.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8441-2025-09-22)##### 🩹 Fixes- **eslint-plugin:** \[await-thenable] should not report passing values to promise aggregators which may be a promise in an array literal ([#11611](typescript-eslint/typescript-eslint#11611))- **eslint-plugin:** \[no-unsafe-enum-comparison] support unions of literals ([#11599](typescript-eslint/typescript-eslint#11599))- **eslint-plugin:** \[no-base-to-string] make ignoredTypeNames match type names without generics ([#11597](typescript-eslint/typescript-eslint#11597))##### ❤️ Thank You- Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger)- mdm317- Ronen AmielYou can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.
| datasource | package | from | to || ---------- | -------------------------------- | ------ | ------ || npm | @typescript-eslint/eslint-plugin | 8.44.0 | 8.44.1 || npm | @typescript-eslint/parser | 8.44.0 | 8.44.1 |## [v8.44.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8441-2025-09-22)##### 🩹 Fixes- **eslint-plugin:** \[await-thenable] should not report passing values to promise aggregators which may be a promise in an array literal ([#11611](typescript-eslint/typescript-eslint#11611))- **eslint-plugin:** \[no-unsafe-enum-comparison] support unions of literals ([#11599](typescript-eslint/typescript-eslint#11599))- **eslint-plugin:** \[no-base-to-string] make ignoredTypeNames match type names without generics ([#11597](typescript-eslint/typescript-eslint#11597))##### ❤️ Thank You- Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger)- mdm317- Ronen AmielYou can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.
| datasource | package | from | to || ---------- | -------------------------------- | ------ | ------ || npm | @typescript-eslint/eslint-plugin | 8.44.0 | 8.44.1 || npm | @typescript-eslint/parser | 8.44.0 | 8.44.1 |## [v8.44.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8441-2025-09-22)##### 🩹 Fixes- **eslint-plugin:** \[await-thenable] should not report passing values to promise aggregators which may be a promise in an array literal ([#11611](typescript-eslint/typescript-eslint#11611))- **eslint-plugin:** \[no-unsafe-enum-comparison] support unions of literals ([#11599](typescript-eslint/typescript-eslint#11599))- **eslint-plugin:** \[no-base-to-string] make ignoredTypeNames match type names without generics ([#11597](typescript-eslint/typescript-eslint#11597))##### ❤️ Thank You- Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger)- mdm317- Ronen AmielYou can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.
This PR contains the following updates:| Package | Change | Age | Confidence ||---|---|---|---|| [@typescript-eslint/eslint-plugin](https://typescript-eslint.io/packages/eslint-plugin) ([source](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/eslint-plugin)) | [`8.39.1` -> `8.47.0`](https://renovatebot.com/diffs/npm/@typescript-eslint%2feslint-plugin/8.39.1/8.47.0) | [](https://docs.renovatebot.com/merge-confidence/) | [](https://docs.renovatebot.com/merge-confidence/) || [@typescript-eslint/parser](https://typescript-eslint.io/packages/parser) ([source](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/parser)) | [`8.39.1` -> `8.47.0`](https://renovatebot.com/diffs/npm/@typescript-eslint%2fparser/8.39.1/8.47.0) | [](https://docs.renovatebot.com/merge-confidence/) | [](https://docs.renovatebot.com/merge-confidence/) |---### Release Notes<details><summary>typescript-eslint/typescript-eslint (@​typescript-eslint/eslint-plugin)</summary>### [`v8.47.0`](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8470-2025-11-17)[Compare Source](typescript-eslint/typescript-eslint@v8.46.4...v8.47.0)##### 🚀 Features- **eslint-plugin:** \[no-unused-private-class-members] new extension rule ([#​10913](typescript-eslint/typescript-eslint#10913))##### ❤️ Thank You- Brad Zacher [@​bradzacher](https://github.com/bradzacher)You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.### [`v8.46.4`](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8464-2025-11-10)[Compare Source](typescript-eslint/typescript-eslint@v8.46.3...v8.46.4)##### 🩹 Fixes- **parser:** error when both `projectService` and `project` are set ([#​11333](typescript-eslint/typescript-eslint#11333))- **eslint-plugin:** handle override modifier in promise-function-async fixer ([#​11730](typescript-eslint/typescript-eslint#11730))- **eslint-plugin:** \[no-deprecated] fix double-report on computed literal identifiers ([#​11006](typescript-eslint/typescript-eslint#11006), [#​10958](typescript-eslint/typescript-eslint#10958))##### ❤️ Thank You- Evgeny Stepanovych [@​undsoft](https://github.com/undsoft)- Kentaro Suzuki [@​sushichan044](https://github.com/sushichan044)- Maria Solano [@​MariaSolOs](https://github.com/MariaSolOs)You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.### [`v8.46.3`](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8463-2025-11-03)[Compare Source](typescript-eslint/typescript-eslint@v8.46.2...v8.46.3)##### 🩹 Fixes- **eslint-plugin:** \[no-duplicate-enum-values] support signed numbers ([#​11722](typescript-eslint/typescript-eslint#11722), [#​11723](typescript-eslint/typescript-eslint#11723))- **eslint-plugin:** \[no-misused-promises] expand union type to retrieve target property ([#​11706](typescript-eslint/typescript-eslint#11706))##### ❤️ Thank You- Evgeny Stepanovych [@​undsoft](https://github.com/undsoft)- taoYou can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.### [`v8.46.2`](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8462-2025-10-20)[Compare Source](typescript-eslint/typescript-eslint@v8.46.1...v8.46.2)##### 🩹 Fixes- **eslint-plugin:** \[prefer-optional-chain] skip optional chaining when it could change the result ([#​11702](typescript-eslint/typescript-eslint#11702))##### ❤️ Thank You- mdm317You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and 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Source](typescript-eslint/typescript-eslint@v8.45.0...v8.46.0)##### 🚀 Features- **eslint-plugin:** \[no-unsafe-member-access] add allowOptionalChaining option ([#​11659](typescript-eslint/typescript-eslint#11659))- **rule-schema-to-typescript-types:** clean up and make public ([#​11633](typescript-eslint/typescript-eslint#11633))##### 🩹 Fixes- **eslint-plugin:** \[prefer-readonly-parameter-types] ignore tagged primitives ([#​11660](typescript-eslint/typescript-eslint#11660))- **typescript-estree:** forbid abstract method and accessor to have implementation ([#​11657](typescript-eslint/typescript-eslint#11657))- **eslint-plugin:** removed error type previously deprecated ([#​11674](typescript-eslint/typescript-eslint#11674))- **eslint-plugin:** \[no-deprecated] ignore deprecated `export import`s ([#​11603](typescript-eslint/typescript-eslint#11603))- **eslint-plugin:** \[unbound-method] improve wording around `this: void` and binding ([#​11634](typescript-eslint/typescript-eslint#11634))- **rule-tester:** deprecate TestCaseError#type and LintMessage#nodeType ([#​11628](typescript-eslint/typescript-eslint#11628))- **eslint-plugin:** \[no-floating-promises] remove excess parentheses in suggestions ([#​11487](typescript-eslint/typescript-eslint#11487))##### ❤️ Thank You- fisker Cheung [@​fisker](https://github.com/fisker)- Josh Goldberg ✨- Kirk Waiblinger [@​kirkwaiblinger](https://github.com/kirkwaiblinger)- Mark de Dios [@​peanutenthusiast](https://github.com/peanutenthusiast)- Richard Torres [@​richardtorres314](https://github.com/richardtorres314)- Victor Genaev [@​mainframev](https://github.com/mainframev)You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.### [`v8.45.0`](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8450-2025-09-29)[Compare Source](typescript-eslint/typescript-eslint@v8.44.1...v8.45.0)##### 🚀 Features- **eslint-plugin:** expose rule name via RuleModule interface ([#​11616](typescript-eslint/typescript-eslint#11616))##### 🩹 Fixes- **eslint-plugin:** \[prefer-nullish-coalescing] ignoreBooleanCoercion should not apply to top-level ternary expressions ([#​11614](typescript-eslint/typescript-eslint#11614))- **eslint-plugin:** \[no-base-to-string] check if superclass is ignored ([#​11617](typescript-eslint/typescript-eslint#11617))##### ❤️ Thank You- mdm317- Moses Odutusin [@​thebolarin](https://github.com/thebolarin)- Yukihiro Hasegawa [@​y-hsgw](https://github.com/y-hsgw)You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.### [`v8.44.1`](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8441-2025-09-22)[Compare Source](typescript-eslint/typescript-eslint@v8.44.0...v8.44.1)##### 🩹 Fixes- **eslint-plugin:** \[await-thenable] should not report passing values to promise aggregators which may be a promise in an array literal ([#​11611](typescript-eslint/typescript-eslint#11611))- **eslint-plugin:** \[no-unsafe-enum-comparison] support unions of literals ([#​11599](typescript-eslint/typescript-eslint#11599))- **eslint-plugin:** \[no-base-to-string] make ignoredTypeNames match type names without generics ([#​11597](typescript-eslint/typescript-eslint#11597))##### ❤️ Thank You- Kirk Waiblinger [@​kirkwaiblinger](https://github.com/kirkwaiblinger)- mdm317- Ronen AmielYou can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.### [`v8.44.0`](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8440-2025-09-15)[Compare Source](typescript-eslint/typescript-eslint@v8.43.0...v8.44.0)##### 🚀 Features- **eslint-plugin:** \[await-thenable] report invalid (non-promise) values passed to promise aggregator methods ([#​11267](typescript-eslint/typescript-eslint#11267))##### 🩹 Fixes- **eslint-plugin:** \[no-unnecessary-type-conversion] ignore enum members ([#​11490](typescript-eslint/typescript-eslint#11490))##### ❤️ Thank You- Moses Odutusin [@​thebolarin](https://github.com/thebolarin)- Ronen AmielYou can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.### [`v8.43.0`](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8430-2025-09-08)[Compare Source](typescript-eslint/typescript-eslint@v8.42.0...v8.43.0)##### 🚀 Features- **typescript-estree:** disallow empty type parameter/argument lists ([#​11563](typescript-eslint/typescript-eslint#11563))##### 🩹 Fixes- **eslint-plugin:** \[prefer-return-this-type] don't report an error when returning a union type that includes a classType ([#​11432](typescript-eslint/typescript-eslint#11432))- **eslint-plugin:** \[no-deprecated] should report deprecated exports and reexports ([#​11359](typescript-eslint/typescript-eslint#11359))- **eslint-plugin:** \[no-floating-promises] allowForKnownSafeCalls now supports function names ([#​11423](typescript-eslint/typescript-eslint#11423), [#​11430](typescript-eslint/typescript-eslint#11430))- **eslint-plugin:** \[consistent-type-exports] fix declaration shadowing ([#​11457](typescript-eslint/typescript-eslint#11457))- **eslint-plugin:** \[no-unnecessary-type-conversion] only report \~\~ on integer literal types ([#​11517](typescript-eslint/typescript-eslint#11517))- **scope-manager:** exclude Program from DefinitionBase node types ([#​11469](typescript-eslint/typescript-eslint#11469))- **eslint-plugin:** \[no-non-null-assertion] do not suggest optional chain on LHS of assignment ([#​11489](typescript-eslint/typescript-eslint#11489))- **type-utils:** add union type support to TypeOrValueSpecifier ([#​11526](typescript-eslint/typescript-eslint#11526))##### ❤️ Thank You- Dima [@​dbarabashh](https://github.com/dbarabashh)- Kirk Waiblinger [@​kirkwaiblinger](https://github.com/kirkwaiblinger)- mdm317- tao- Victor Genaev [@​mainframev](https://github.com/mainframev)- Yukihiro Hasegawa [@​y-hsgw](https://github.com/y-hsgw)- 민감자(Minji Kim) [@​mouse0429](https://github.com/mouse0429)- 송재욱You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.### [`v8.42.0`](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8420-2025-09-02)[Compare Source](typescript-eslint/typescript-eslint@v8.41.0...v8.42.0)##### 🩹 Fixes- **deps:** update eslint monorepo to v9.33.0 ([#​11482](typescript-eslint/typescript-eslint#11482))You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.### [`v8.41.0`](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8410-2025-08-25)[Compare Source](typescript-eslint/typescript-eslint@v8.40.0...v8.41.0)##### 🩹 Fixes- **deps:** update dependency prettier to v3.6.2 ([#​11496](typescript-eslint/typescript-eslint#11496))You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website.### [`v8.40.0`](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8400-2025-08-18)[Compare Source](typescript-eslint/typescript-eslint@v8.39.1...v8.40.0)##### 🚀 Features- **typescript-estree:** forbid invalid keys in `EnumMember` ([#​11232](typescript-eslint/typescript-eslint#11232))##### ❤️ Thank You- fisker Cheung [@​fisker](https://github.com/fisker)You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website.</details><details><summary>typescript-eslint/typescript-eslint (@​typescript-eslint/parser)</summary>### [`v8.47.0`](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/parser/CHANGELOG.md#8470-2025-11-17)[Compare Source](typescript-eslint/typescript-eslint@v8.46.4...v8.47.0)This was a version bump only for parser to align it with other projects, there were no code changes.You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.### [`v8.46.4`](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/parser/CHANGELOG.md#8464-2025-11-10)[Compare Source](typescript-eslint/typescript-eslint@v8.46.3...v8.46.4)This was a version bump only for parser to align it with other projects, there were no code changes.You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.### [`v8.46.3`](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/parser/CHANGELOG.md#8463-2025-11-03)[Compare Source](typescript-eslint/typescript-eslint@v8.46.2...v8.46.3)This was a version bump only for parser to align it with other projects, there were no code changes.You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.### [`v8.46.2`](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/parser/CHANGELOG.md#8462-2025-10-20)[Compare Source](typescript-eslint/typescript-eslint@v8.46.1...v8.46.2)This was a version bump only for parser to align it with other projects, there were no code changes.You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.### [`v8.46.1`](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/parser/CHANGELOG.md#8461-2025-10-13)[Compare Source](typescript-eslint/typescript-eslint@v8.46.0...v8.46.1)This was a version bump only for parser to align it with other projects, there were no code changes.You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.### 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PR Checklist
Overview
The problem was not about which type was the switch argument and which was the case, and more so about the fact that the rule didn't consider unions of number literals to be numbers (and ditto for strings).